/**
 * ***************************************************************
 * JADE - Java Agent DEvelopment Framework is a framework to develop
 * multi-agent systems in compliance with the FIPA specifications.
 * Copyright (C) 2000 CSELT S.p.A.
 * 
 * GNU Lesser General Public License
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation,
 * version 2.1 of the License.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA  02111-1307, USA.
 * **************************************************************
 */
package jade.util.leap;

/**
   The LEAP (environment-dependent) version of the &qote;java.util.SortedSet&qote; interface.
   This interface appears to be exactly the same in J2SE, PJAVA and MIDP.
   The internal implementation is different in the three cases however.
   An ordered collection that contains no duplicate elements.
 */
public interface SortedSet extends Set {

    /**
     * Returns the first (lowest) element currently in this sorted set.
     * 
     * @return the first (lowest) element currently in this sorted set.
     */
    Object first();
}

